blob: 6da37c34a847def6f37d9eb9becef3aa1b130430 [file] [log] [blame]
Robin Getz479ba602010-05-03 17:23:20 +00001/*
2 * Copyright 2005-2010 Analog Devices Inc.
3 *
4 * Licensed under the ADI BSD license or the GPL-2 (or later)
5 */
6
7#include <linux/linkage.h>
8
9/* void *strncpy(char *s1, const char *s2, size_t n);
10 * R0 = address (dest)
11 * R1 = address (src)
12 * R2 = size (n)
13 * Returns a pointer to the destination string dest
14 */
15
16#ifdef CONFIG_STRNCMP_L1
17.section .l1.text
18#else
19.text
20#endif
21
22.align 2
23
24ENTRY(_strncmp)
25 CC = R2 == 0;
26 if CC JUMP 5f;
27
28 P0 = R0 ; /* s1 */
29 P1 = R1 ; /* s2 */
301:
31 R0 = B[P0++] (Z); /* get *s1 */
32 R1 = B[P1++] (Z); /* get *s2 */
33 CC = R0 == R1; /* compare a byte */
34 if ! cc jump 3f; /* not equal, break out */
35 CC = R0; /* at end of s1? */
36 if ! cc jump 4f; /* yes, all done */
37 R2 += -1; /* no, adjust count */
38 CC = R2 == 0;
39 if ! cc jump 1b (bp); /* more to do, keep going */
402:
41 R0 = 0; /* strings are equal */
42 jump.s 4f;
433:
44 R0 = R0 - R1; /* *s1 - *s2 */
454:
46 RTS;
47
485:
49 R0 = 0;
50 RTS;
51
52ENDPROC(_strncmp)